CVE-2022-36338

8.2 highEPSS 0.5%

High (8.2) in insyde insydeh2o. EPSS 0.5% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver FwBlockServiceSmm, creating SMM, leads to arbitrary code execution. An attacker can replace the pointer to the UEFI boot service GetVariable with a pointer to malware, and then generate a software SMI.

Severity

CVSS 3.1

8.2 high

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
Published: 2022-09-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

insyde:insydeh2o

References

https://binarly.io/advisories/BRLY-2022-017/index.html
https://www.insyde.com/security-pledge
https://www.insyde.com/security-pledge/SA-2022029
https://binarly.io/advisories/BRLY-2022-017/index.html
https://www.insyde.com/security-pledge

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